Just thought I'd post this link for the Ceramic Door glass I bought to use with my Batch Box build I'll be doing soon. It's only $99 and 11x17 and comes with a gasket. This was the best value I could find as most similar ones were going for 2 or 3 times the price. The quality seems pretty good and I'll post and update whenever I get around to building my Batch Box. For the amount of money saved in wood each year, I think $100 is a small price to pay for the huge aesthic upgrade on a stove you'll be using for many years.
Earth Stove Door Glass Kit (BV400, BV400-2, BV400c, BV450c, BV500c, 1800HT, 2800HT, 1900HT-M)
https://a.co/d/5YEeYFj